Processing 1.0 - Processing Discourse - Trouble getting simple program to start

We closed this forum 18 June 2010. It has served us well since 2005 as the ALPHA forum did before it from 2002 to 2005. New discussions are ongoing at the new URL http://forum.processing.org. You'll need to sign up and get a new user account. We're sorry about that inconvenience, but we think it's better in the long run. The content on this forum will remain online.

Index › Programming Questions & Help › Programs › Trouble getting simple program to start

‹ Previous Topic | Next Topic ›

Pages: 1

Trouble getting simple program to start (Read 774 times)

check2010

Trouble getting simple program to start
Apr 10^th, 2010, 9:04pm

Hello all. I've gone through this code several times, looking for the slightest typo or syntax mistake, yet come up dry. Any help would be more than appreciated.

Code:


Penguin penguin;
Penguin penguin2;

float thetapenguin = 0;

void setup() {
  size(800,600,P3D);
  smooth();

  penguin = new Penguin(50);
  penguin2 = new Penguin(-50);
}

void draw() {
  background(255);

  penguin.display();
  penguin2.display();

  penguin.move();
  penguin2.move();
}

Class:

Code:


Class Penguin {
  float xpos;
  
  Penguin(float xpos_) {
    xpos = xpos_;
  }
  
  void display() {
    fill(0,0,125);
    
    pushMatrix();
    translate(width/2,height/2,0);
    rotateX(thetapenguin);
    
    ellipse(width/2-xpos,height/2,50,50);
    ellipse(width/2+xpos,height/2,50,50);
  }
  
  void move() {
    thetapenguin+=.02;
    popMatrix();
  }
}

Giles Senior Member Offline Posts: 252	Re: Trouble getting simple program to start Reply #1 - Apr 10^th, 2010, 9:15pm You have pushMatrix() in the display method...but popMatrix() is in the move method... these should both be in the display method, I think.

check2010

Re: Trouble getting simple program to start
Reply #2 - Apr 10^th, 2010, 9:31pm

That was a good idea, but still no luck. I'm getting an "unexpected token: Penguin" error, while the "error line" consists of my { and } in my void draw() { function.

I mean this (in bold):

Code:


void draw() [b]{[/b]
  background(255);

  penguin.display();
  penguin2.display();

  penguin.move();
  penguin2.move();
[b]}[/b]

Edit: I see bold doesn't work within coding. But at least you're able to see where it leads me to when I try to run my program.

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: Trouble getting simple program to start Reply #3 - Apr 11^th, 2010, 1:35am That's `class`, not `Class`. (I had to triple check to see it... )

check2010 YaBB Newbies Offline Posts: 43 Illinois, USA	Re: Trouble getting simple program to start Reply #4 - Apr 11^th, 2010, 10:43am Thanks! It is now running. But when the program starts, I don't see anything, just a white (background is white) screen. My penguin-in-progress isn't printing off screen is it? And when I go to exit the program, it takes three or four clicks of the 'x'.

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: Trouble getting simple program to start Reply #5 - Apr 11^th, 2010, 3:15pm You do a translate, so basically you should draw at 0, 0 since the translate moved that point to the center of the window.

Pages: 1

‹ Previous Topic | Next Topic ›